No. 39] ODONATA OF CONNECTICUT: AESHNIDAE 



183 



Group I. The Caerulia Group 

 Aeshna caerulia septentrionalis Burmeister 

 Handbuch der Entomologie II: 839; 1839. 



The only species in this group likely to be found in Connecticut 

 is caerulia var. septentrionalis, the anal appendages of which are 

 shown in Fig. 27. 



Fig. 27. Aeshna caerulia sep- Fig. 28. Aeshna juncea, anal 



tentrionalis, anal appendages and appendages and color pattern of 



color pattern of thorax. (From thorax. (From Howe.) 

 Howe.) 



Group 2. The Juncea Group 



Aeshna juncea Linnaeus 



Although this species has been reported from Connecticut, the 

 report has been found to be incorrect, and so far as known to the 

 writer, no specimens have been captured in this State. The color 

 pattern of the thorax and structure of the anal appendages are 

 shown in Fig. 28. 



Group 3. The Clepsydra Group 

 Aeshna canadensis Walker 



Canadian Entomologist, 40: 382, 389: 1908. 



Adult, male. — Color brown, marked with green or dark blue. 



Head : front green or blue, T-spot of the front with upright 

 about as wide as the cross-arm and convex in front; ocellar area 

 dark brown, rear of head black. 



Thorax: brown with blue or green markings, dorsal bands of 

 the mesepisterna 3.6 by about i mm. sometimes invisible in pinned 

 specimens (Fig. 29; Fig. 38, No. 6) ; mesepimeral pale stripe with 

 cephalic margin bent caudad at middle, making the dorsal half of 

 the stripe about half as wide as the ventral ; a small pale spot mid- 

 way between metathoracic spiracle and wing base ; metepimeral 

 stripe with somewhat irregular margins, and widened at wing 

 bases ; legs brown, tarsi and ventral surfaces of the femora 

 darker ; wings hyaline, stigma brown. 



